JLG 15/20MSP Service Manual - Manual (Page 86)

SECTION 4 - CONTROL COMPONENTS
4-30 – JLG Lift – 3121231
4.9 OBSTRUCTION SENSOR SYSTEM -
SERVICE PROCEDURE (MSP - OPTION)
General
The Obstruction Sensor System (OSS) Control Module is
mounted between the rails of the mast platform header
section under the platform decal billboard at the rear of
the MSP model platform, see illustration below.
The OSS Control Module communicates with the Ground
Control Module through the platform electrical junction
box also mounted on the mast behind the platform decal
billboard.
The OSS Control Module circuit board monitors six (6)
channels each channel is wired to an individual trans-
ducer sensor mounted under the MSP model platform.
The sensors are mounted in a manner to provide a detec-
tion zone beneath the platform and detect if an object has
entered that zone when the platform is being lowered.
NOTE: The OSS only operates normally when the Ground
Control Module - Power Selector Switch (Key) is set
to PLATFORM CONTROL MODE.
When the Power Selector Switch (Key) is set to
GROUND CONTROL MODE the OSS will detect an
obstruction but will not stop platform downward
movement or sound the horn. However, the OSS
Control Module LED will flash if a sensor detects the
presence of an object.
An OSS Sensor replacement kit is available from the JLG
Parts Department for individual sensors. The kit provides
instructions and everything necessary to connect the new
sensor to the existing soldered wire ends.
If the OSS Control Module has failed it is recommended to
replace the complete OSS system. See Section 6 of this
manual for further OSS Troubleshooting instructions.
1. Mast Platform Header Section 3. Obstruction Sensor Control Module
2. Platform Electrical Junction Box 4. Transducer Sensor Arrangement
Figure 4-9. Obstruction Sensor System Components (Platform Cutaway)
1
2
3
4